INDEX. 



715 



Pelobates, 484 



Pelodytes (a genus of frogs), 484 



(a genus of thread worms), 

 164 

 Pelomyxa palustris, 24 

 PelopKus, 363 

 Peltogaster, i!76, 277 

 Pelycosauiia, 513 

 Penella, 278 

 Penguin, 541 

 Pennatula aculeata, 86 

 Penlacrinus, 101 

 Peutacta tromiosa, anatomy of, 



137 

 Peniastonia. 340 

 Penliiinitcs, 107 

 Pei'ca fluviatilis, 455 

 Percli, 455 



sea, anatomy of, 484 

 Peridinium, 34 

 Peripalus, anatomy of, 335 

 Perisarc, 61 

 Perissodactyla, 600 

 Perla, 347 

 Perophora, 391 

 Petalosticha, 133, 126 

 Petromyzon marinus, 410 



niger, 410 



nigi'icans, 410 

 Pezopliaps solitarius, 547 

 Phalangella flabellans, 186 

 Phalangium, 342 

 Phaiyngobranchii, 408 

 Pliascolosoma csementarium, 204 



"Gouldii, 201 

 Pberonema Annse, 48 

 Pbocsena bracbycium, 595 



lineata, 595 

 Pboenicopterus ruber, 544 

 Phoronis, 223 

 Phosphorescent annelides, 237 



ascidians, 392 



Hydrozoa. 70 



insects, 355 



Phosphorescent annelides, Pro 

 tozoa, 83 



worms, 217 

 Phrynosoma Douglassii, 508 

 Phylactolsemata, 186 

 Phyliocarida, 291, 305 

 Phyllopoda, 280 

 Phyaa heteroslropha, 245 

 Physalia arethusa, 68 

 Pliyseter macrocephalus, 594 

 Pliysiology, 13 

 Picarise, 550 



Pigeon, anatomy of, 585 

 Pilidium, 217 

 Pill bug, 286, 287 

 Pipa Americana, 485 

 Pipe fish, 461 

 Pirarucu, 442 

 Pisces, characters of, 411 , 463 



development of, 418, 433, 

 445 

 Pissodes strobi, 353 

 PI agios tomi, 419 

 Plagusia, 460 

 Planarian worms, 141 



land, 145 



lasso-cells of, 143 



nervous system of, 143 



parasitic, 145 

 Planaria torva, 141 

 Plant lice, 350 

 Planula, 59 

 Platygaster, 36-1 

 Platyhelminthes, 141, 163 

 Platyptera, 347 

 Plectognalhi. 461 

 Pliohippus, 603 

 Plesiosaurus, 513 

 Plelhodon erytbronotum, 479 

 Pleurobrachia rbododactyla, 93 

 Pleurolepis pellucidus, 456 

 Pleuroma, 398 

 Pleurum of insects, 309 

 Plumatella, 183 



